The segmentation of the strobila is very indistinct, but the reproductive organs occur at regular intervals.
There are some species which, having no hydroid or strobila state, mature without alternation of generation (metagenesis).
But in the case of the strobila we say that it is not changed, but dies, and is no part of the personality of the medusa.
strobila, stro-bī′la, n. a discomedusan at the stage succeeding the scyphistoma: a segmented tapeworm.
strobila stro·bi·la (strō-bī'lə)
n. pl. stro·bi·lae (-lē)
The segmented main body part of the adult tapeworm.